Description

In older versions of Minecraft (I believe those before powered rails were introduced), minecarts and activated TNT, if in a water stream, would be pushed (somewhat slowly) by the water; this no longer occurs.

Whether or not this was disabled deliberately, I request that it be re-added, because it adds more interactions to the game and enables interesting mechanisms:

Minecarts:

Separating stuck-together minecarts, a glitch which can occur in complex automated minecart systems.